Sensor Failure

1. Connect EEC-IV 60-Pin Breakout Box to the ABS control with the ABS Adapter Cable.
2. Disconnect the suspect anti-lock brake sensor.
3. Check the harness for shorts.





1 Monitor the resistance between EEC-IV 60-Pin Breakout Box pins and ground, and between EEC-IV 60-Pin Breakout Box pins.

NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.

2 Drive over rough roads at various speeds.
3 If there is continuity between either circuit and ground, or between the two circuits, repair the circuit(s) for a short.

4. Check the harness for an open circuit.
1 Connect a jumper between the two pins on the suspect sensor connector.

NOTE: Connect the jumper securely to the suspect sensor connector.





2 Monitor the resistance between EEC-IV 60-Pin Breakout Box pins.

NOTE: Use 88 Digital Multimeter with the maximum resistance hold feature enabled for this test.

3 Drive over rough roads at various speeds.
4 If there is an open circuit detected between pins, repair the circuit(s) for an open circuit.

5. Check suspect sensor pigtail.
1 Monitor the resistance between suspect sensor terminals while wiggling the pigtail.

NOTE: Use 88 Digital Multimeter with the maximum resistance hold feature enabled for this test.

2 If the resistance does not remain between 2,400 and 2,800 ohms, replace the sensor.
3 Monitor the resistance between a sensor terminal, and ground on the highest resistance scale of the meter while wiggling the pigtail.

NOTE: Use 88 Digital Multimeter with the minimum resistance hold feature enabled for this test.

4 If the meter shows anything but an open circuit, replace the sensor.